Ed wrote:
In my 1999 Winnie (it may be an F-350) the cigarette lighter and the
Diagnostic plug are alone on a 20 amp fuse. You might want to just
pick up that circuit if you are under 20 amps.
John Ferrell W8CCW



My E450 ( not F ) has an additional cig lighter type socket a few
inches above the cig lighter socket on the dash. I would much prefer to
wire directly to the battery, but will consider your suggestion if I can
not find a decent way to route wire to the engine compartment. Thanks.

Ed
There is usually enough room alongside where the wiring harness passes through
the firewall, also alongside where the heater/air goes through. On some Ford
trucks there was a rubber plug in the floor behind the drivers seat. Also if you
have an on-the-floor shifter, that's also a good spot to pass a pair of wires.
If you have to drill, do it if possible on the side kick panels, then route the
wires into the engine compartment from the wheel wells...

Bob N9LVU